Isobutyl nitrite, C4H9NO2, is an alkyl nitrite, an ester of isobutanol and nitrous acid. Its chemical structure is (3)2CH-CH2--O.
Isobutyl nitrite is a pungent colorless liquid. It acts as a vasodilator, and is used as an inhalant recreational drug.
Amyl nitrite is employed medically to treat heart diseases
such as angina
and to treat cyanide
poisoning. It is also used as an inhalant
drug that induces a brief euphoria
; whilst already intoxicated with stimulant drugs such as cocaine
or ecstasy (see MDMA
) the euphoric state intensifies and lasts for several minutes longer. Once some stimulative drugs wear off, a common side effect is a period of depression
, colloquially called a "come down"; amyl nitrite is sometimes used to "come up" again in order to stop the user from feeling lousy.